The laptops are Compaq Presario Cq56s, similar to the one pictured in the issued image.

PC Andrea Richards, based at Whalley Range, said: "These laptops were to be used by school children and their theft has deprived them of valuable learning tools.

"In the current climate primary schools can ill-afford to have valuable property stolen in this way and I am making a direct appeal to anyone who is offered one of these computers in suspicious circumstances – you need to call the police straight away.

"You might think you are getting a bargain, when in actual fact you would be turning a blind eye to a really cynical theft."

Anyone with information is asked to call police on 0161 856 4973 or the independent charity Crimestoppers, anonymously, on 0800 555 111.